package oldCar;

import java.util.HashSet;
import java.util.Set;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: ling
 * Date: 2023-04-01
 * Time: 14:26
 */
public class demo1 {
    public static void main(String[] args) {
        Set<Integer> set = new HashSet<>();
        set.add(2);
        set.add(4);
        set.add(5);
        set.add(1);
        set.add(7);
        for(Integer a : set){
            System.out.println(a);
        }
        String[] s = new String[10];
    }
}
